题目内容：

    Cameron is no ordinary dog, and not just because he was born on Valentine's Day. To Maggie, a first grader at Burgundy Farm Country Day School, the dog who spends most days on campus is more like a friend. When Cameron is near, Maggie feels "really, really, happy," she said, "I feel safe around him, she added.  "He '11 lie down and ask  me to scratch his tummy," she explained, because Cameron likes Maggie.

Cameron is one of a handful of dogs at Burgundy, a K-8 private day school in Alexandria, Virginia. Dogs started showing up there when the head of school, Jeff Sindler, brought his clumsy Labrador, Luke, to the main office building where Sindler works. After Luke died, Sindler adopted Cameron and brought him to campus, too, where the dog Maggie described as really cute" became a school favorite.

“They don’t care if you are good at basketball or a great reader, or popular," Sindler said. “They just want to be loved — equal opportunity," he added. "Cameron and the other dogs on campus—are always fastened with a rope and with their owner一go a long way toward improving students' social and emotional well-being," he said. They reduce tension and ease anxiety, and inspire happy feelings from students.

“They bring out some important emotions/' he said, “and are especially helpful to children and adults who struggle in social communication, Children often came from challenging backgrounds: many lived in poverty, or had to travel through dangerous neighborhoods to get to school, or shared a too-crowded home. When these emotionally needy children met the dogs, they relaxed and were more prepared to learn.

Just as important, dogs on school grounds set a positive, welcoming tone. They help preserve the school climate that is accepting, supportive and curious・"Dogs are one way to hold on to Sindler said, adding that "schools should be fun and exciting, and dogs can be a big part of that."

For Sindler, including Cameron was all part of an effort to create a safe environment where learning could flourish.

1.What makes the dog Cameron really special?

A.His rare species B.His particular birthmark.

C.His attractive appearance. D.His friendly nature.

2.How do dogs on campus improve students' social and emotional well-being?

A.By playing fetch together fondly.

B.By offering them comfort equally.

C.By playing basketball together freely.

D.By walking a long way together happily.

3.What docs the underlined word"that" in paragraph 5 refer to?

A.A positive tom. B.The school ground.

C.A welcoming attitude. D.The school atmosphere.

4.What’s the purpose of the passage?

A.To encourage schools to bring in more dogs.

B.To explain why dogs help students with learning.

C.To introduce a way to help students grow healthily,

D.To explore the possibility to challenge no-dog rules.